cargo: bump the patch group with 4 updates (#1940)

Bumps the patch group with 4 updates:
[regex](https://github.com/rust-lang/regex),
[serde_yaml](https://github.com/dtolnay/serde-yaml),
[cxx](https://github.com/dtolnay/cxx) and
[cxx-build](https://github.com/dtolnay/cxx).

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>